| http://www.w3.org/ns/prov#value | - Because the propagating light mode in a single-mode optical fiber is generally much larger than the beam size in a single-mode channel waveguide made from a semiconductor material such as silicon (Si) or compound semiconductors (e.g., AlGaAs, InGaAsP), it is necessary to transform the beam size between a fiber and an integrated semiconductor optical waveguide.
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